TY - GEN
T1 - Simultaneous apatial and frequency domain filtering at the antenna inputs achieving up to +10dBm out-of-band/beam P 1dB
AU - Ghaffari, A.
AU - Klumperink, Eric A.M.
AU - van Vliet, Frank Edward
AU - Nauta, Bram
N1 - 10.1109/ISSCC.2013.6487647
PY - 2013/2/18
Y1 - 2013/2/18
N2 - Multi-antenna transceivers with beam-forming are recently gaining interest for low GHz frequencies (<6GHz) [1-4]. In the antenna beam, (phase-shifted) signals from multiple antennas add constructively, improving SNR, while out-ofbeam signals add destructively (i.e. spatial filtering). Usually the summation point is behind some gain blocks, which then need to be capable of handling strong signals. To improve the input-referred compression point P1dB, a fully passive switched-capacitor approach was presented in [4], providing P1dB=+2dBm, but at a high noise penalty: NF=18dB. Here we propose to sum immediately at the baseband capacitors of passive mixer-first switched-RC downconverters. We show that this can render a direction-dependent RF impedance (spatial filtering) together with RF bandpass frequency filtering at lower noise and higher P1dB.
AB - Multi-antenna transceivers with beam-forming are recently gaining interest for low GHz frequencies (<6GHz) [1-4]. In the antenna beam, (phase-shifted) signals from multiple antennas add constructively, improving SNR, while out-ofbeam signals add destructively (i.e. spatial filtering). Usually the summation point is behind some gain blocks, which then need to be capable of handling strong signals. To improve the input-referred compression point P1dB, a fully passive switched-capacitor approach was presented in [4], providing P1dB=+2dBm, but at a high noise penalty: NF=18dB. Here we propose to sum immediately at the baseband capacitors of passive mixer-first switched-RC downconverters. We show that this can render a direction-dependent RF impedance (spatial filtering) together with RF bandpass frequency filtering at lower noise and higher P1dB.
KW - EWI-23442
KW - IR-86270
KW - METIS-297701
U2 - 10.1109/ISSCC.2013.6487647
DO - 10.1109/ISSCC.2013.6487647
M3 - Conference contribution
SN - 978-1-4673-4515-6
SP - 84
EP - 85
BT - Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2013 IEEE International
PB - IEEE
CY - Piscataway
T2 - IEEE International Solid-State Circuits Conference, ISSCC 2013
Y2 - 17 February 2013 through 21 February 2013
ER -